Remove Google Analytics.

Google shut down the Universal Analytics script that the pages loaded,
and we haven't used it probably a decade

.env.example

@@ -23,9 +23,6 @@ RECAPTCHA_SITE_KEY=
 RECAPTCHA_PROJECT_ID=
 RECAPTCHA_API_KEY=
 
-# Google Analytics tracking ID. Leave it empty to turn analytics off.
-GOOGLE_ANALYTICS_ID=
-
 # Directory for uploaded images waiting to be saved. Keep it outside the
 # web root. The default is xxx-uploads in the system temporary directory.
 UPLOAD_DIR=

bottombar.inc.php

@@ -2,4 +2,3 @@
 All stories and submissions <a class="whitefont" href="about">&copy;</a> 2003&ndash;<?php echo gmdate("Y"); ?> their respective authors. 
 </p></footer>
 <?php $_SESSION['referrer'] = $_SERVER['REQUEST_URI']; ?>
-<?php include_once('google.inc.php'); ?>

google.inc.php

@@ -1,13 +0,0 @@
-<?php
-$ga_id = config('GOOGLE_ANALYTICS_ID');
-if (! $is_admin && $ga_id) { ?>
-<script>
-  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-
-  ga('create', <?= json_encode($ga_id, JSON_HEX_TAG) ?>, 'auto');
-  ga('send', 'pageview');
-</script>
-<?php } ?>

tests/php/Pages/NoAnalyticsTest.php

@@ -0,0 +1,19 @@
+<?php
+namespace Xxx\Tests\Pages;
+
+use Xxx\Tests\Support\PageTestCase;
+
+// The site has no Google Analytics, even with the old GOOGLE_ANALYTICS_ID in the environment
+class NoAnalyticsTest extends PageTestCase {
+  protected static function serverEnv(): array {
+    return array('GOOGLE_ANALYTICS_ID' => 'UA-12345-1');
+  }
+
+  public function testNoPageLoadsAnalytics(): void {
+    foreach (array('/', '/article', '/about', '/publish', '/publish/login') as $path) {
+      $body = $this->get($path)['body'];
+      $this->assertStringNotContainsString('UA-12345-1', $body, $path);
+      $this->assertStringNotContainsString('google-analytics', $body, $path);
+    }
+  }
+}

tests/php/fixtures/test.env

@@ -7,7 +7,6 @@ SITE_URL=https://site.test
 RECAPTCHA_SITE_KEY=test-site-key
 RECAPTCHA_PROJECT_ID=test-project
 RECAPTCHA_API_KEY=test-api-key
-GOOGLE_ANALYTICS_ID=
 UPLOAD_DIR=
 UPLOAD_DIR_LIMIT_MB=1
 DISPLAY_ERRORS=